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       # COMPEX, INC.
       
          ANET-16-1A(REVISION C2)
       
          NIC Type         ARCnet                                        
          Transfer Rate    2.5-Mbps                                      
          Data Bus         16-bit ISA                                    
          Topology         Linear bus, Star                              
          Wiring Type      RG-58A/U 50ohm coaxial                        
                                                                         
                           Unshielded twisted pair                       
          Boot ROM         Available                                     
       
   IMG IMG 1
          
       
          +------------------------------------------------------------+
          |                 BASE MEMORY ADDRESS SELECT                 |
          |------------------------------------------------------------|
          | Address  |  J2/A   |  J2/B   |  J2/C   |  J2/D   |  J2/E   |
          |----------+---------+---------+---------+---------+---------|
          |  C0000h  | Closed  | Closed  | Closed  | Closed  | Closed  |
          |----------+---------+---------+---------+---------+---------|
          |  C4000h  | Closed  | Closed  |  Open   | Closed  | Closed  |
          |----------+---------+---------+---------+---------+---------|
          |  CC000h  | Closed  |  Open   | Closed  | Closed  | Closed  |
          |----------+---------+---------+---------+---------+---------|
          |  D0000h  | Closed  |  Open   |  Open   | Closed  | Closed  |
          |----------+---------+---------+---------+---------+---------|
          |  D4000h  |  Open   | Closed  | Closed  | Closed  | Closed  |
          |----------+---------+---------+---------+---------+---------|
          |  D8000h  |  Open   | Closed  |  Open   | Closed  | Closed  |
          |----------+---------+---------+---------+---------+---------|
          |  DC000h  |  Open   |  Open   | Closed  | Closed  | Closed  |
          |----------+---------+---------+---------+---------+---------|
          |  E0000h  |  Open   |  Open   |  Open   | Closed  | Closed  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                          BOOT ROM                          |
          |------------------------------------------------------------|
          |             Setting             |           J1/C           |
          |---------------------------------+--------------------------|
          | » |          Disabled           |           Open           |
          |---+-----------------------------+--------------------------|
          |   |           Enabled           |          Closed          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                         CABLE TYPE                         |
          |------------------------------------------------------------|
          |            Type            |      J5       |      J6       |
          |----------------------------+---------------+---------------|
          | » | RG-58A/U 50ohm coaxial |  Pins 1 & 2   |  Pins 1 & 2   |
          |   |                        |    closed     |    closed     |
          |---+------------------------+---------------+---------------|
          |   |   Unshielded twisted   |  Pins 2 & 3   |  Pins 2 & 3   |
          |   |          pair          |    closed     |    closed     |
          +------------------------------------------------------------+
       
       +----------------------------------------------------------------------+
       |                           INTERRUPT SELECT                           |
       |----------------------------------------------------------------------|
       |  IRQ  | J4/A | J4/B | J4/C | J4/D | J4/E | J4/F | J4/G | J4/H | J4/I |
       |-------+------+------+------+------+------+------+------+------+------|
       |»|IRQ2 |Closed| Open | Open | Open | Open | Open | Open | Open | Open |
       |-+-----+------+------+------+------+------+------+------+------+------|
       | |IRQ3 | Open |Closed| Open | Open | Open | Open | Open | Open | Open |
       |-+-----+------+------+------+------+------+------+------+------+------|
       | |IRQ4 | Open | Open |Closed| Open | Open | Open | Open | Open | Open |
       |-+-----+------+------+------+------+------+------+------+------+------|
       | |IRQ5 | Open | Open | Open |Closed| Open | Open | Open | Open | Open |
       |-+-----+------+------+------+------+------+------+------+------+------|
       | |IRQ7 | Open | Open | Open | Open |Closed| Open | Open | Open | Open |
       |-+-----+------+------+------+------+------+------+------+------+------|
       | |IRQ10| Open | Open | Open | Open | Open | Open | Open | Open |Closed|
       |-+-----+------+------+------+------+------+------+------+------+------|
       | |IRQ11| Open | Open | Open | Open | Open | Open | Open |Closed| Open |
       |-+-----+------+------+------+------+------+------+------+------+------|
       | |IRQ12| Open | Open | Open | Open | Open | Open |Closed| Open | Open |
       |-+-----+------+------+------+------+------+------+------+------+------|
       | |IRQ15| Open | Open | Open | Open | Open |Closed| Open | Open | Open |
       +----------------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     I/O ADDRESS SELECT                     |
          |------------------------------------------------------------|
          |    Address    |     J3/A     |     J3/B     |     J3/C     |
          |---------------+--------------+--------------+--------------|
          |     260h      |    Closed    |    Closed    |    Closed    |
          |---------------+--------------+--------------+--------------|
          |     290h      |    Closed    |    Closed    |     Open     |
          |---------------+--------------+--------------+--------------|
          |     2E0h      |    Closed    |     Open     |    Closed    |
          |---------------+--------------+--------------+--------------|
          |     2F0h      |    Closed    |     Open     |     Open     |
          |---------------+--------------+--------------+--------------|
          |     300h      |     Open     |    Closed    |    Closed    |
          |---------------+--------------+--------------+--------------|
          |     350h      |     Open     |    Closed    |     Open     |
          |---------------+--------------+--------------+--------------|
          |     380h      |     Open     |     Open     |    Closed    |
          |---------------+--------------+--------------+--------------|
          |     3E0h      |     Open     |     Open     |     Open     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        NODE ADDRESS                        |
          |------------------------------------------------------------|
          |Node |SW1/1 |SW1/2 |SW1/3 |SW1/4 |SW1/5 |SW1/6 |SW1/7 |SW1/8|
          |-----+------+------+------+------+------+------+------+-----|
          |  0  |  -   |  -   |  -   |  -   |  -   |  -   |  -   |  -  |
          |-----+------+------+------+------+------+------+------+-----|
          |  1  | Off  |  On  |  On  |  On  |  On  |  On  |  On  | On  |
          |-----+------+------+------+------+------+------+------+-----|
          |  2  |  On  | Off  |  On  |  On  |  On  |  On  |  On  | On  |
          |-----+------+------+------+------+------+------+------+-----|
          |  3  | Off  | Off  |  On  |  On  |  On  |  On  |  On  | On  |
          |-----+------+------+------+------+------+------+------+-----|
          |  4  |  On  |  On  | Off  |  On  |  On  |  On  |  On  | On  |
          |-----+------+------+------+------+------+------+------+-----|
          | 251 | Off  | Off  |  On  | Off  | Off  | Off  | Off  | Off |
          |-----+------+------+------+------+------+------+------+-----|
          | 252 |  On  |  On  | Off  | Off  | Off  | Off  | Off  | Off |
          |-----+------+------+------+------+------+------+------+-----|
          | 253 | Off  |  On  | Off  | Off  | Off  | Off  | Off  | Off |
          |-----+------+------+------+------+------+------+------+-----|
          | 254 |  On  | Off  | Off  | Off  | Off  | Off  | Off  | Off |
          |-----+------+------+------+------+------+------+------+-----|
          | 255 | Off  | Off  | Off  | Off  | Off  | Off  | Off  | Off |
          |------------------------------------------------------------|
          |Note:Node address 0 is used for messaging between nodes and |
          |must not be used.                                           |
          |                                                            |
          |  A total of 255 node address settings are available. The   |
          |  switches are a binary representation of the decimal node  |
          |  addresses. Switch 1 is the Least Significant Bit and      |
          |  switch 8 is the Most Significant Bit. The switches have   |
          |  the following decimal values: switch 1=1, 2=2, 3=4, 4=8,  |
          |  5=16, 6=32, 7=64, 8=128. Turn off the switches and add the|
          |  values of the off switches to obtain the correct node     |
          |  address. (On=0, Off=1)                                    |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                   TIMEOUT CONFIGURATION                    |
          |------------------------------------------------------------|
          |     Response Time      |      J1/A       |      J1/B       |
          |------------------------+-----------------+-----------------|
          | »  |      74.7µs       |      Open       |      Open       |
          |----+-------------------+-----------------+-----------------|
          |    |      283.4µs      |      Open       |     Closed      |
          |----+-------------------+-----------------+-----------------|
          |    |      561.8µs      |     Closed      |      Open       |
          |----+-------------------+-----------------+-----------------|
          |    |     1118.6µs      |     Closed      |     Closed      |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                          TOPOLOGY                          |
          |------------------------------------------------------------|
          |               Type               |           J7            |
          |----------------------------------+-------------------------|
          | » |             Star             |         Closed          |
          |---+------------------------------+-------------------------|
          |   |          Linear bus          |          Open           |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          |            Purpose            |          Location          |
          |-------------------------------+----------------------------|
          |    External LED connector     |            LJ1             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                      DIAGNOSTIC LEDS                       |
          |------------------------------------------------------------|
          | LED  | Color |  Status  |            Condition             |
          |------+-------+----------+----------------------------------|
          | LED1 |  Red  | Blinking |   Network connection is broken   |
          |------+-------+----------+----------------------------------|
          | LED1 |  Red  |    On    |    Network connection is good    |
          |------+-------+----------+----------------------------------|
          | LED2 | Green |   Off    |        Data is not being         |
          |      |       |          |       transmitted/received       |
          |------+-------+----------+----------------------------------|
          | LED2 | Green |    On    |          Data is being           |
          |      |       |          |       transmitted/received       |
          +------------------------------------------------------------+